Bioalmanac

Testagen

Testes peptide

Preclinical

Status reviewed 18 Aug 2026

Assigned to testicular tissue, and routinely mistaken for a hormone. It is not one, it is not claimed to be one, and that is the most useful thing to know about it.

Storage

Freeze-dried powder: Refrigerated at 2–8 °C, protected from light.
After mixing: Refrigerated at 2–8 °C. Do not freeze once mixed.
Long-term, frozen: Unopened powder is stable at −20 °C or colder.

Reconstitution — 20 mg vial, 2000 mcg dose

On a 1 mL U-100 syringe. Check every figure against your own vial before drawing.

Water added	Concentration	Volume to draw	Units	Doses per vial
1 mL	20 mg/mL	0.1 mL	10 units	10
2 mL	10 mg/mL	0.2 mL	20 units	10
3 mL	6.667 mg/mL	0.3 mL	30 units	10
5 mL	4 mg/mL	0.5 mL	50 units	10

Dose ranges reported in sources

Descriptions of what sources report, not recommendations.

Goal	Range	Frequency	Source
Course described in community sources	1000–2000 mcg	Daily for a 10-day course, repeated a few times a year	Community practice

When to stop

Any allergic response: rash, hives, facial swelling or difficulty breathing. Seek urgent care.
An injection site that becomes hot, spreading or produces pus.
Any new or unexplained symptom you would ordinarily see a doctor about.

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